Even Nazi Germany did not make killing the official "intention" or government policy

Nazi Germany started with different policies depending on the target group:

• Jews, Blacks, other "non Aryans": deport to Africa.
• Gay and "deviant sexuality": jail, ostracism, castration, labor camps, or death penalty.
• Wrong nationality or religion: labor camps.
• Genetically defective (excluding gay), Gypsies: kill on sight.

Then, when the conquest of North Africa got thwarted, and the costs of war started piling up more and more, Mr. Reinhard (aka "The butcher of Prague", among other similar nicknames) came up with the definitive alternative: "kill them all".

There were always "some Nazi extremists" who wanted to "kill them all" from the beginning... just like now we have "some Russian extremists" who wanted to "nuke Paris and London" from the beginning... or "some Israeli extremists" who wanted to "push all Palestinians to concentration camps in Egypt" from the beginning, or "tear down all non-Jewish homes" (that includes both Muslim and Christian).

There is little evidence that Israel, like Hamas, “intends” to destroy an ethnic group—the Palestinians

...and of course that is total BS. The foundation of Israel is the UN resolution, which has two parts:

1. Creating two states: Israel, and Palestine
2. Merging the two states into one

AKA: there can only be one state left... so someone has to get stomped out.

That's what the UN and Israel's Declaration of Independence have been saying all the time.